Preparation method of composite polymer electrolyte membrane

A technology of composite polymer and electrolyte membrane, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, and final product manufacturing. It can solve the problems of battery charge and discharge performance degradation, affect battery performance, and battery explosion, and improve compatibility. , the formation of inhibition, the effect of improving interface performance
CN104650375AInactive Publication Date: 2015-05-27CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2015-05-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of a composite polymer electrolyte membrane. The preparation method comprises the following steps: dissolving a polymer matrix in a solvent, then adding nanometer oxide, carrying out ultrasonic dispersion for 15-60 minutes while stirring at the temperature of 25-45 DEG C, and then stirring for 3-6h at the temperature of 25-45 DEG C to obtain a homogeneous system; then adding first lithium salt into the homogeneous system, further stirring for 16-24h, and drying for 12-24h to obtain a membrane liquid; and finally, carrying out membrane preparation on the membrane liquid to obtain the composite polymer electrolyte membrane. When or before the composite polymer electrolyte membrane is mounted in a battery, an electrolyte solution containing second lithium salt is added to form a mode of mixed lithium salt. According to the preparation method disclosed by the invention, the composite polymer electrolyte membrane is good in interfacial properties and electrochemical properties, is nonflammable, can not leak and is simple in preparation process, wide in raw material source, excellent in interfacial compatibility and good in electrochemical stability window.
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Description

technical field

[0001] The invention belongs to the field of chemistry and chemical engineering, and in particular relates to a preparation method of a solid composite polymer electrolyte membrane. Background technique

[0002] Due to its high energy density, high output voltage, long cycle life, and low environmental pollution, lithium-ion batteries are widely used in digital electronic products such as mobile phones and tablets. The field of energy vehicles has shown broad prospects and strong development momentum, and it is a very promising electrochemical energy storage device. However, in recent years, there are common reports about safety accidents caused by lithium-ion batteries, and its safety issues have attracted the attention of many researchers.

[0003] Liquid electrolyte is a type of electrolyte that is widely used in commercial lithium-ion batteries at this stage, but the safety problems caused by liquid leakage limit the further development and application o...

Claims

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